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Finding the Fourth Proportional to 7,951.82, 11,929.11 and 2,686.87

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Solution

The fourth proportional to 7,951.82, 11,929.11 and 2,686.87 is: 4,030.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,951.82 : 11,929.11 = 2,686.87 : x
  2. Step 2: Convert to fraction form
    7,951.82/11,929.11 = 2,686.87/x
  3. Step 3: Cross multiply
    7,951.82x = 11,929.11 × 2,686.87
  4. Step 4: Simplify right side
    7,951.82x = 32,051,967.79
  5. Step 5: Solve for x
    x = 32,051,967.79/7,951.82
  6. Step 6: Final answer
    x = 4,030.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.